| http://www.w3.org/ns/prov#value | - A process as claimed in claim 4 in which said dope is an aged dope prepared by acetylating cellulose to form cellulose triacetate and then saponifying and aging said cellulose triacetate with a mixture of acetic acid and water until there is obtained a dope containing cellulose acetate having a degree of esterification of 2.0 to 2.8, said aged dope containing 1.5 wt. % or less of an inorganic salt
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